28252072 has 8 divisors (see below), whose sum is σ = 52972650. Its totient is φ = 14126032.

The previous prime is 28252057. The next prime is 28252117. The reversal of 28252072 is 27025282.

28252072 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in only one way, i.e., 24147396 + 4104676 = 4914^2 + 2026^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28252072.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1765747 + ... + 1765762.

Almost surely, 2^28252072 is an apocalyptic number.

It is an amenable number.

28252072 is a deficient number, since it is larger than the sum of its proper divisors (24720578).

28252072 is a wasteful number, since it uses less digits than its factorization.

28252072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3531515 (or 3531511 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 28252072 is about 5315.2678201573. The cubic root of 28252072 is about 304.5674132610.

The spelling of 28252072 in words is "twenty-eight million, two hundred fifty-two thousand, seventy-two".